Spark eliminator and smoke consumer



, July 13, 1937. .k-E. HAZELTON SPARK ELIMINATOR AND SMOKE CONSUMER Filed Sept. 14, 1934 N VEN TOR JOSEPH E. H1925; ro/v.

Patented July 13, 1937 UNITED STATES ztsasn PATENT 'FFEQE SPARK ELIMINATOR AND' SMOKE CON- SUMER Mich.

Application September 14, 1934, Serial No. 744,060

1 Claim.

This invention relates to improvements in spark eliminator and smoke consumers which may be used upon home furnaces either steam, hot water or hot air, stationary steam boiler furnace, also boiler furnace of locomotives, traction engines, steamboats and the like.

The object of the invention is to provide a simple and practical apparatus of' this character which will not only effectively prevent fires due to sparks from smoke stacks or chimneys but which will consume the smoke, save fuel, increase the draft and render the operation of the furnace otherwise more effective and economical.

Another object is to provide means for changing to the straight draft or exhaust to atmos phere direct; and to provide a single controlling lever by means of which the mechanism for effecting the above may be operated and adjusted.

Still another object is to supply the Vfire with an artificial draught, thereby eliminating smoke combustion in the furnace and also eliminating combustion chambers.

Still another object is to have the proper draught under any weather condition and in case of dry weather or high winds it is not necessary to shut down manufacturing plants due to flying sparks.

A further object is to provide a device for taking smoke from the chimney or stack and removing cinders, soot and other particles therefrom and delivering said cinders, soot and other particles above the furnace grates for reburning, thus eliminating fire hazards from sparks in furnaces which have automatic stokers.

The invention consists essentially of a fan or blower adapted to withdraw the smoke, Cinders, soot and gasses from the outlet pipe through a suitable pipe and force said smoke etc. into aseparator which separates the cinders, soot and gases from the lighter gases and air. All heavy particles as well as heavy gases are conveyed back to the furnace for reburning, while the lighter gases and air are conveyed to the smoke stack or chimney. The return of the heavier gases and soot to the furnace or the like is performed either automatically by thermostatic control or manually. It will be noted, with an apparatus of this nature, high smoke stacks are not necessary as the invention creates all the draught required.

Further and minor objects will more fully appear hereinafter, reference being had to the ac companying drawing which illustrates what I believe to be the best embodiment of the invention, in which:

Figure 1 shows a side elevation of the invention installed on a furnace, namely, a hot air furnace.

Figure 2 is a detailed View on an enlarged scale of the mercury switch shown in Figure 1. I

Figure 3 is a fragmentary view in side elevation of the exhaust pipe and the by-pass pipe leading to the blower as disclosed in Figure 1.

Referring to Figure 1, a furnace i is shown having the usual draught pipe 2 and elbow 3 which is connected to the outlet pipe 4. There is a pipe 5 having one of its ends connected to said pipe 4 and having the other end connected to a blower 5 which is driven by a motor 1. A pressure pipe 8 is attached at one end to the top of the blower 6, while the other end of pipe 8 is connected to the inlet side of separator 53. The separator 9 is of the usual centrifugal type separator which has three pipe connections; namely the incoming or recirculating pipe 8, pipe Ii which connects the bottom of the separator to the furnace, and escape pipe H is for carrying off the lighter gases to the chimney 1A.

Still referring to Figure l, a system of cables, chains or the like is shown. having a hand operated reel H2 or any other suitable actuating means such as a thermostatic control mechanism. The manually operated reel is shown at the on position and when it is turned to that position, cable I3 is pulled toward the reel, thereby opening damper M and draft door It through the medium of lever 95.

Whenreel I2 is turned to the off position, cable I3 is moved in the opposite direction as that indicated by the arrows. The lever i5 is thus radially actuated because it is connected at its center to the shaft of the damper 44 thereby closing the damper. As the inner end of lever I 5 is being lowered by cable I 3, a cable I i, which is attached to the outer end of lever i5, is pulled upwardly thereby operating the lever l3 mounted on the shaft of damper 29. There is another cable llA attached near the outer end of lever i5 and which is adapted to open door It, when the damper if. is in closed position.

Another cable 2! is provided which is connected to one end of lever 49 and having the other end connected to reel l2. This cable is also used to operate a switch 22 which is a conventional type of mercury switch.

A link 23 connects levers l8 and 2 1 together. The link 23 is adapted to actuate lever 24 of the damper 25. A spring 26 is connected on one end to bracket 21 held in place on pipe 3 and connected on the other end to said link 23 through hole 23A. The link 23 travels radially when it is operated, because both levers I9 and 24 are the same length. The levers i9 and 24 act as a snapon and off mechanism and partially lock the whole system at either on or off position. The tension spring 25 is adapted to assist the levers l9 and 24 through the medium of the link 23 in opening and closing their respective dampers 20 and 25. Another cable 28 is provided and which is connected to the end of lever 24 and to the back draft door 29 so that door 29 will be opened and closed. All cables referred to above passing through pulleys as shown in order to avoid friction.

The switch referred to above is operated by cable 2 l. Cable 2| is attached to the pivoted arm 22 of the mercury switch, and whenever the cable is moved up or down, the switch arm 22 is also moved up or down. The arm 22 is pivoted to a bracket GI. The mercury bulb 36 is securely fastened to the free end of the arm 22. Wires 3'! and 38 indicate the electric circuit. The circuit is closed when cable 2| pulls the arm 22 down, and the circuit is opened when cable 2! moves the arm 22 upwardly.

Pipe it) has a'bend IUA, and because of this bend, it is necessary for the pipe to be cleaned out. There is a housing 38 provided for the damper !4, and the housing 39 has an aperture 33A opening into the pipe Iii. A cover 3! is normally secured by screws 4! over the aperture 3ilA, but it may be removed so that a brush can be inserted into the pipe id to push the accumulated dirt into the furnace l g The gas outlet pipe l l is adjustable, that is, up and down, as shown by dotted lines l 5A and l H3. The pipe H is held in its adjusted positions by a split collar 34. The collar 34 is secured to the pipe I i by a bolt 32 and nut 33 as shown in Figure 12. The adjustment of pipe H is essential to the operation of separation, when installing the system or when installing a new blower or motor. When the pressure of a blower is determined the pipe H is inserted to the proper working depth and locked for the proper separation of the heavy particles from the lighter gases.

It will be noted that in order to eliminate vibrations and undue noise, the motor "i and blower 6 are mounted on a common base 35 secured on the chimney wall. The base 35 straddling the outgoing pipe 4 in order to be low enough to accommodate the required height of pipes to and from the separator. The separator also being noiseless due to bars 39 being mounted on said separator and having resilient pads ll! between the contacting foot and the ceiling.

The operation of the invention is very simple, when heat is required, the reel is turned to the on direction pulling cables in the direction shown by arrows, opening lower draught door i6, closing door I8, opening damper i l, opening damper 29, closing damper 25 and back draught door 539. At the same time cable 25 pulls down lever 22 which closes the electric circuit to motor l which in turn rotates blower 6. The outgoing smoke, cinders etc., are pulled by the suction of said blower 6 and due to damper 25 and draught door 29 being closed as well as damper 26 being open, said outgoing smoke etc. are forced at high pressure into separator 5 through pipe 8. The soot is forced centrifugally inside of the separator at a high rate of speed, the heavy particles cling to the wall by centrifugal force while going down, whereas, the lighter gases being too light to follow the heavier particles, escape through pipe H into chimney, while said heavy particles fall through the separator down into pipe 49 and into fire box of furnace to be burned.

When the amount of heat is suficient, the reel or automatic mechanism is reversed, closing draught door I5, opening door 18, closing damper l4, closing damper 28, opening damper 25 and opening draught door 29 thereby letting the gases escape through pipe 4 in the manner of the ordinary type of furnace. When the reel is turned to off position, cable l3 through the medium of lever 15 pulls cable H up, and cable ll pulls up cable 2! through the medium of lever 19 which moves arm 22 up, when arm 22 is moved up, the circuit 31-48 is opened thereby stopping the motor 7.

From the above description of the invention it will be noted that the heavy particles mentioned are unburned material which would otherwise be wasted if not collected and reburned by the invention.

Having thus described my invention, what I claim as new is:

The combination with a furnace including a fire box provided with a smoke pipe, a by-pass pipe, and a blower having motor operating means being connected to the smoke pipe by the by-pass pipe, the said smoke and by-pass pipes having damper means therein and the said damper means being connected together, a recirculating pipe being connected to the outlet side of the said blower, a separator being connected to the other end of the recirculating pipe, the said separator having a return pipe connected to its lower end and leading to the fire box, the said return pipe having damper means therein, a second smoke pipe connected to the top side of the separator for the escape of the lighter gases, a control device embodying a rotatable reel, a cable trained over the reeland being connected to one end of the return pipe damper means, a second cable trained over the reel and being connected to one end of the by-pass damper means, and the second mentioned cable having a switch means attached thereto, a third cable being trained overpulleys and being connected to an end or" the return pipe damper means, and the said third cable also being connected to an end of the by-pass pipe damper means, the said control device adapted for opening both the return pipe damper means, and the by-pass damper means while at the same time closing the smoke pipe damper means, and the said switch means adapted to be closed simultaneously with the opening of the by-pass damper means thereby starting the motor operating means for the said blower.

JOSEPH E. HAZELTON. 

